Roller applicator for adhesive



P 1956 E. MADALINSKI 2,762,072

ROLLER APPLICATOR FOR ADHESIVE Filed Nov. 22, 1952 6 gezze 7/[ @269 75United States Patent O ROLLER APPLICATOR FOR ADHESIVE Eugene Madalinski,Chicago, 11]., assignor to Le Madden My invention relates generally toroller applicators for liquid adhesives and more particularly to anarrangement for preventing sticking of the adhesive applying rollerduring protracted periods of non-use.

Adhesive spreaders employing a reservoir or magazine for supplyingadhesive to an applying roller have heretofore been open to theobjection that the roller becomes stuck by dried films of adhesiveforming between the sides of the roller and the jaws supporting theroller.

I have found that if the sides of the roller are kept supplied with afilm of a suitable liquid preventing the formation of a dried film ofadhesive, the applying roller will turn readily even after long periodsof non-use. In carrying out the invention I provide a reservoir on eachside of the applying roller and connect the reservoir to a pad ofabsorbent material contacting the side of the roller, so that the padwill cause a film of oil or other suitable liquid to come into contactwith the sides of the roller. In a preferred aspect of the invention thepads of absorbent material are held in position by members which alsoserve to meter a proper thickness of adhesive material along theserrated cylindrical surface of the roller.

It is a principal object of the invention, therefore, to provide animproved liquid adhesive applicator characterized by a novelconstruction for preventing sticking of the roller after periods ofnon-use.

Other objects and important features of my invention will becomeapparent from a study of the following specification taken with thedrawing which together show a preferred embodiment of the invention andwhat is now considered to be the best mode of practicing the principlesthereof. Other embodiments may be suggested to those having the benefitof the teachings herein and I therefore intend that the scope of theinvention not be limited by the precise embodiment herein shown, andonly by the scope of the claim subjoined.

In the drawing:

Fig. 1 is a perspective view showing an adhesive applicator havingembodied therein the improvements according to my invention;

Fig. 2 is a substantially full scale fragmentary front elevation viewthereof, certain parts being shown in longitudinal cross section;

Fig. 3 is a top view thereof;

Fig. 4 is a side elevation view thereof;

Fig. 5 is a longitudinal sectional view taken along the line 5-5 of Fig.4, to a larger scale than that shown in Fig. 4;

Fig. 6 is a sectional view taken along the line 6-6 of Fig. 5 looking inthe direction of the arrows;

Fig. 7 is a sectional view taken along the line 77 of Fig. 4 but to thesame scale as that shown in Fig. 6; and

Fig. 8 is a view taken substantially along the line 8-8 of Fig. 2 andlooking in the direction of the arrows.

Referring now particularly to Fig. 1 of the drawing, my improvedadhesive applicator is referred to generally by the reference numeral 10and comprises a generally cylindrical tube 11 having threaded thereto anend closure 12 and an adhesive applying structure referred'to generallyby the reference numeral 13 and also threaded to the tube 12. Thestructure 13 and the end closure 12 thus define a reservoir for a supplyof liquid adhesive which is metered to an applying roller 14 mounted inthe structure 13. The roller 14 is thus adapted to roll a film 16 of theadhesive on to any desired surface 17.

Referring now to the remaining figures of the drawing, the structure 13is generally of a frustro-conical shape and has a cylindrical flange 18which is threaded at 19 to the cylindrical tube 11. The structure 13 ismilled with a slot 15 to provide a pair of spaced jaws 21 and is boredat 22 to receive a pin 23 supporting the applying roller 14 which isserrated in the manner shown as at 16.

The structure 13 is bored at 24 along the axis thereof and connects witha rectangular shaped passage 26 intersecting the milled slot 15. It willbe seen that the supply of liquid adhesive is brought against the roller16 upon inverting of the dispenser 10. The juncture of passage 26 withthe milled slot 15 provides shoulders 27 spaced a slight distance fromthe periphery of the wheel 14 so as to regulate in part the amount ofadhesive carried thereby as it rotates upon the pin 23.

The pin 23 is held in proper position in the jaws 21 by socket heat setscrews 28, one of said set screws 28 being provided in each jaw. Inpractice, the distance between the jaws 21 and the thickness of thewheel 14 are so related that a minimum clearance is alforded consistentwith freedom of turning of the wheel, so that any escape of liquidadhesive along the sides of the wheel 14 and between the jaws 21 is heldto a minimum.

In order to provide proper alignment for the roller 14 within the jaws21 so that free turning is had, the pin 23 supporting the roller 14 isaligned by adjusting the pressure exerted by the set screws 23.

I provide means for applying a thin film of a suitable liquid forbreaking the bond between the jaws 21 and the sides of the roller 14caused by the presence of an unwanted dried film of adhesivetherebetween and formed during periods of non-use. To this end, theinner faces of each jaw 21 is provided with a slotted recess 29 for apad of absorbent material 31 contacting the side of the roller 14. Thepad 31 is kept supplied with a suitable fluid breaking the aforesaidbond by means of a reservoir 32 disposed on each side of the pin 23 andin the jaw 21. The reservoir 32 is closed by a screw plug 33 which maybe of the socket head type.

In the usual case, each reservoir 32 is kept supplied with a lighthydrocarbon oil which has been found suitable to break the bond of theadhesive material.

I also provide means for holding the absorbent pads 31 in positionagainst endwise movement in their recesses 29. The base of the milledslot 15 accordingly forms a support for keeper members 34 provided withslots 36 to receive screws 37 tapped into the base of the slot 15. Thekeeper members 34 may be adjusted in their position with respect to theperiphery of the serrated roller 14 effectively to meter the thicknessof the adhesive film carried thereby, at the same time preventingshifting of the absorbent pad 31 in its recess 29.

While the invention has been described in terms of a preferredembodiment thereof, I do not intend that the scope be limited by thewithin embodiment nor otherwise than by the terms of the claim hereappended.

I claim:

An applicator for liquid adhesives comprising a supply chamber, a pairof spaced jaws supporting an adhesive applying roller having a portionof its periphery adapted to be in contact with adhesive held in saidsupply chamber, means for preventing sticking of said roller occasionedby Patented Sept. 11, 1956 the unwanted presence of a film of adhesivebetween the sides of said roller and said jaws comprising a pad ofabsorbent material held in each jaw and contacting a side of saidroller, a reservoir disposed in each jaw for a supply of a liquidcapable of proyiding a .filrn of such liquidbetween said roller and saidjaws to prevent the presence of such of said adhesive, each of saidreservoirs being in communication with its adjacent pad of absorbentmaterial so that .said absorbent material will maintain a film of suchlast named liquid against the side of said roller, and keeper membersdisposed between said jaws and spaced from the periphery of said roller,said keeper members being adjustable in position according to thedesired thickness of adhesive along the periphery of said pads ofabsorbent material in position in said jaws.

References Cited in the file of this patent I UNITED STATES PATENTS267,000 Kennedy Nov. 7,1882 555,763 Fessenden Mar. 3, 1896 r 1,212,440Becker Jan. 16, 1917 2,176,418 Daley Oct; 17., 1939 2,581,848 Ettl Jan.8, 1952 2,613,382 Patterson Oct. 14, 1952 FOREIGN PATENTS 456,927Germany Mar. 6,1928

